adjust NewObj.ResultType to work better with delegates

ICSharpCode.Decompiler/IL/Instructions.cs

@@ -2380,7 +2380,7 @@ namespace ICSharpCode.Decompiler.IL
 		public NewObj(IMethod method) : base(OpCode.NewObj, method)
 		{
 		}
-		public override StackType ResultType { get { return StackType.O; } }
+		public override StackType ResultType { get { return Method.DeclaringType.GetStackType(); } }
 		public override void AcceptVisitor(ILVisitor visitor)
 		{
 			visitor.VisitNewObj(this);

ICSharpCode.Decompiler/IL/Instructions.tt

@@ -174,7 +174,7 @@
 		new OpCode("unbox.any", "Unbox a value.",
 			Unary, HasTypeOperand, MemoryAccess, MayThrow, ResultType("type.GetStackType()")),
 		new OpCode("newobj", "Creates an object instance and calls the constructor.",
-			CustomClassName("NewObj"), Call, ResultType("O")),
+			CustomClassName("NewObj"), Call, ResultType("Method.DeclaringType.GetStackType()")),
 		new OpCode("newarr", "Creates an array instance.",
 			CustomClassName("NewArr"), HasTypeOperand, CustomArguments("size"), MayThrow, ResultType("O")),
 		new OpCode("initobj", "Initializes the value at an address.",